The Ss Brewtech Blow-Off Cane 3" TC for 7 Gallon Chronical Fermenter - Brewmaster Edition is made out of sturdy and solid 304 stainless steel. It is intended to be used with the chronical series of fermenters that have a 3" TC lid, which are are used in all of the BrewMaster Edition Chronicals. Included into the design of the Blow-Off cane is a pressure relief valve that releases pressure under 2-2.5 psi. It does not come with a 3" TC Clamp or a 3" TC gasket, both of which are needed to attach the blow-off cane to your fermenter.